Valve grinder



June 5, 1923. 1,457,785

F. MERDIAN VALVE GRINDER Filed Sept. 13 1922 5 Sheets-Sheet l 40 Z 48 47 43 {if 7 7" e0 M74071 6Z/Z June 5, 1923.

F. MERDIAN VALVE GRINDER s Shets-Sheet 2 Filed Sept. 15

Jun 5; 1923.

F. MERDIAN VALVE GRINDER Filed Sept. 15, 1922 3 Sheets-Sheet 3 so Figure; 3

Patented June VALVE eernnnn,

ToaZZwhomz'tmayiconcem: II 7 Be it known that LkFminM noun; a citizenfof the United States, residing aLVanqcouvenin the county of Clarke and'vState of :.Washington, have invented certain newv and nseful Improvements in :Valve Grinders, of which the following is a specification, refer- This inventionvrelatestoyimprovementsin valve grinders, and more I particularly to} a device of this character adapted-t0 simuL taneously grind a plnrality'of valves 'v; I Z An important object of the invention is to provide a device of'this character which may Y be applied directly tothe'cylinder of an ternalcombustion engine and secured thereto to grind the valves in position. Another object of'the invention is toiprovide a device of this character wherein the shifting of the valveupon its seat is anto,- matically accomplished. by the operation of the machine.

I further object.-oftheinventionis topro- 2 vide in a device of thi scharacter having grindingmeans fOrf grinding a .plnralityof valves at the same time, means 1 whereby the to impinge against their .seats in a slightly shiftedlposition. a a Astilliurther object of the'inventionzis to provide a. device:ofthis character in which the grinding, "and controlling mechanism is compactly arranged andso constructed that disarran'gin'g the same. V a.

,'An additional object of the'invention is to piovidea device of rthi s' character which' 'is simple in its, constrn'ction and arrangement,

it. may be readilv handled without danger/of durable in, service, and. ageneral improver merit in the art.

1 The invention l details and arrangement of the mechanism as shown in the raccompany ng' drawings, in

which'b- I y Figure l 'isa plan viewof a valve grinding: mechanism" constructed ,accordance with'm'y'invention; I 1 Figure 2. is a-front elevation thereof; I I is a sectiondon thefline 3 3 of g ,7

' rnnnmnnnmiv, or? vhnootrvnn awAsrtiiqeroia- I Figurel is a a mn x Eigure 5 isa s ectiononthe line 5-,- 5 of -F au e f s 1, I v Figure is a fragmentaryenlargedjeleva I I :tion, the plate being-eremqvedand parts f1 being broken'awayL-E' end: being. had to the accompanyinggdrawv I I Q'drawingathe numeral 10ldesignates a base a plate which is substantially"rectangular-and I which is providedin onesideithereoi with -0 'p r i l11----- T Pl te iipt v ddr Y 1 rupeet en e s'ur' '.a. g 2ia i p d 65 engine 3 cylinder block; j with. wh-ichl the I grinding devic ei is to be employed; The base 1 plate is furtherlprovided"with-,aniopeningilii adapted to align. with the} second head bolt I opening 1 3 for i the reception of -a gsecuringv holtlflsblthat the plate may be-rigidlyse l cared to the head ofthe engine. EXte nfding up wardly from the base "plate at opposite ends thereof areflend 'bearing'platesazfl and i 18 ,-.and: intermediate these plates;and-,at the forward sideoftheeutnont 11; ifromtheibearfl E ntermedi t Kb a v 1 .in 'r:plate 19. valves ,are successively liftedand allowed tohold theseplatesrigidlyinpositioni',The a. I ends ofthebearing plates 18 and 1Q are'con I nected b v, end plates-25.and'26"which-com- Y .bine I with the bearing plates 18 and 191300 Referring now r -lr rt liiariyfieb fli to engage intheghead bolt opening] '13 Of-the in'g "plate 17- is/a.

I'nay be designated the rear-endthereof with w an extension:20' forming a bracket vcoacting witha bracket I 21, securedto': I and extending gupwardlv-and rearwardly from th e plate 10 I 1 intfermediate the bearing;plates"17 and-'19. gTh es'e brackets form a vsupport for a I motorb'ase :pl ate 22-111mm which a m'ot'or 23 may be a i 2 fmountedzfor 'a purpose hereinafter -f'to ap..- .f l pear. Av brace 24 extends intermediate the bearing =plates 1'1 and 19g and is secured to each thereof and: to the bracket 21 tending form aigear .box' in- -whicht the. operating niechanism ofthe deViceiistontamed, -j

Th nu 7? es gn t s f p s d-w y de plates extending intermediatethebearings 17 and 19=andhaving their ends-mounted in sockets 28 I formed in.I.th e adjacent ifacesg'zof these fi g' P i T ei=g 1 idq platesnr arranged above the cutout portion ll-and L "tion,"t h e shaft 52 being 65 plates-'27 and shaft 41, "Thatportiqnf f with relation to the pinions 31 as regards endwise movement of the shaft and prevent relative rotation of the pinion andv shaft,

The lower ends of the shafts 33 are provided with heads 36 having upon their 'l'ower faces valve engaging lements 37 adapted to engage in the sockets formed in the valve for engagement with a grinding tbol. The upperend of each of the shafts v33 is externally screw-threaded and is further providedjwith a bore 40 opening throngli' such upper end which is screw-threaded. A. head 38 is provided having a threaded bore in its lower end engaging the upper end of the ste-m 'and an openin'g formed in its upper end for the reception of a set screw 39 engaging in the bore 10 of the stem. This head may be adjusted upon the stem and "locked in adjusted positionby mesmer- =the set screw for a purpose presently to appear. Between the lower' guide plate and the upper face of the head 361a spring 3341s disposed which ,surroundsthe shaft 33 and which forces the same downwardly so as to normally maintain the upper end 35 of the slot 34 in engagement with the pin 35. Slidably and rotatably mounted in the bearing plates '17 and 19' is a shaft 41 having formed thereon worms 4L2 engaging the pinion's 31. The end portion of the shaft 40 41 projects into the gearbox and has secured thereto within the gear hox'a pinion 43 and a collar 4A having a yoke receiving groove 15, the collar 44in the. present instance being shown as formed integrally 45 the pinion 43. The pinion 13 meshes with a gear 46 's' ecured to the shaft 47 havng its ends mounted 'in. the end :plates 25 I and 26. This shaft has mounted thereon a wiperram 48 operating between rigid 5 'arms' 49 secured to a shaft 50 having its ends jslidably mounted in'the bearingplates 18 and 19. This shaft has secured thereto a shifter fork 51' engaging in the' groove 45 .of' the collar 4 1." It will be'gseen that when the shaft 4L7 is rotated the shaft 41 will be simultaneously rotated and reciprocated, the design of the gear 46 and'pinion 43 be- '-1ng' such thatthey remain in'mesh during the shilfting of'the shaft. l n v A camshaft 52 having cams 53 monnte d :thereon corresponding in number and arrangement. .159 the shafts 33 is mounted in the bearing plates 17, 13 and 119 for rotaparallel to the guide the shaft 52 disposed within the gearbox has secured thereto a spiral gear 54 meshing with a pinion 55 mounted upon the shaft 47 and is further provided with a gear 56 meshing with a pinion 57 carried by a shaft 58. The shaft is rotatably mounted in the bearin plates-18 'and 19 and has one end thereof extending through the bearing plates and provided with a drive pulley 5 9 adapted to be connected with a drive pulley 60 upon the shaft of the motor 23 by a belt 61. It is to be here stated that the motor and the driving connections between the motor and shaft 58 are merely illustrated since any desired sourceof power m be employed'f and any means may be to "the shaft 58, Intermediate the guide plates 27 and the cam shaft 52 and parallel f to each thereof is a bearing shaft 62 mounted in the bearing plates 17 ant T19 and having mounted thereon rocker arms corresponding in number and arrangement to shafts 33 and came 53. The shaft engaging 'endi of the. rocker arm"-63 is furca't ed, as

indicated lat/ 64; to receive therebetween the shank of the head 38 the arms formedfby the furcation being'provided with upstand- 'ing end portions 65 engagingbeneath. the

flange 38 of the head: The'cam engaging provided forconnectin'g the source. of power ends66 of the" rocker arms eir'tend in the path of the camsl53 but are so disposed "as to clear the-shaft The wiping facet? of the cams 53' terminates in an abrupt shoulder 68 which suddenly releases the rocker arms 63 to permit: the shaft to be forced downwardly by its spring with a snap motion.

In the use of my device; the'same is sevalve and within the valve pocket These springs 70 will be of less strengthithanthe pear. 'A valve grinding compound haying been placedbetween the valve 69 and seat 73 thereof; the motor or other source of power is thrown into operation. The drive from the motor is transmitted to the shafts 52 and47, the rotation of the latter having the effect of simultaneously rotating andrejciprocating the shaft 11, this shaft being continuously rotated in the same direction. The rotation of the sh'aftetl causes the pinspi ing s "33 for reasons hereinafter to ap;

ions 31 to be rotated in a given direction given Speed an eq'cq d g y the sees 33 are likewise rotat d i conjunctiqn Fn this rotation. Rotation in opposite directions is applied to the pinions 31 and shafts 33 by the reciprocation of. the shaft4l, this shaft during its reciprocation acting'as. a rack engaging the pinionsand causing such alternate rotation." 'This rotation inopposite directions taken in conjunction with a continuous rotation in one direction results in an advancing movementof the shaft 33. Since the rotation imparted to the pinion by the rotation of the shaft is, during movement of the shaft in one direction, added to the rotation imparted by such movement and during the movementiof the shaft in the opposite direction subtracted therefrom,

' spring 70. Since the valve is continually in movement, the valve will be rotated while held from its seat and will be engaged 'with the seat at a new spot and the. valve grind- 7 ing compound accordingly shifted and prevented from bunching and pocketing. As the cam leaves the rocker arm, the same is released permitting the shaft 33 tov move down- Wardly smartly under the action of spring 33, reseating the valve with a snap. action similar to the action of the valve in seating during operation of the engine. The extent or strength of the blow applied by the valve in engaging its seat may be regulated by adjusting the head 38 so as to shorten the length of movement of the shaft 33 under influence of the cam 53. In actual use it has been found that the application of the snap action inreturning the valves to their seats results in a much more perfectly ground seat than is possible in the ordinary manner of valve grinding where the valve is permitted to leave its seat and simply return toits seat by pressure or'the weight of the tool with which the grinding is being done. Furthermore.v since a plurality of.

valves may be simultaneously ground and similar movements are applied to each thereof. all of the valves'will be ground in approximately the same length of 'time,"resulting in the completion of the valve grinding operation for the number of valves which the machine is adapted to grind, four in the present instance, in the same time that it would ordinarily require to grind a single valve. 7

While the construction hereinbefore described and illustrated is particularly adapted for use with a particular style of engine, the principledisclosed is applicable to grinding the valves ofpra'ctica'lly'all engines ,where the valves. areseated jdirectly'in either the head or cylinder blockof an engine h-av ing a' removable head. It is believed tobe obvious thata construction such ashere'in 9 before described will result in a material saving of'tim'e ingrinding the valves and at the same time the valves will be ground with a mechanical precision impossible where hand -operated machines are= .em- 'ployed. It will furthermore be obvious that the construction hereinbefore described and" shown in the accompanyingdraw'ings is capable of many changes and modifications withoutmaterially departing from the spirit j of my invention, and I' accordingly-do not cept as hereinafter claimed.

I claim-:

limit myself to such specific structure exf 1. In valve grinding mechanism, a valve v engaging element, andmeans for 'continu-j ously oscillating the element and rotatably K advancing'the same in a given direction, in- 6 eluding a pinion operatively connected with the valve engaglngelement, a worm engaging said pinion, and means for simultaneously reciprocatlng the worm and rotat ng the same in a given direction.

2. In valve grinding mechanism, a plural ity of shafts each provided with a valve engaging head, pinions on said shafts, a Worm engaging said pinions, and means for simultaneously rotating and reciprocating said worm.

3. In valve grinding mechanism, a. shaft provided with a valve engaging head, a pinion on said shaft, a worm engaging said pinion, a second shaft, drive gearing 'connecting said shaft and said worm, and means operated from said second. shaft for reciproeating said worm.

4. In'valve grinding mechanism, shaft provided with a valve engaging head, a pinion on said shaft, a worm engaging said pinion, a second shaft, drive gearing "connecting said shaft and said worm, meansoperated 0nd shaft, a'third shaft, armsc'arried by said "from said second, shaft for reciprocating said worm, including a cam carried by said seeshaft and arranged in the path ,ofsaid cam, and a, connection between said" third shaft and worm wherebvlthe worm is 'reoiprocated in. conjunction with said third shaft.

5. In valve grinding mechanisr'ma' shaft,a valve engaging head carried thereby, a]

spring normally forcing the head in'one di-' subsequently suddenly releasing the same,

shaft including a pinion carried by the shaft and means for progremively rotating the}. t

6. In valve grinding mechanism, a shaft said cam upon opposite sides of said second provided With a valve engaging head, a pin shaft, and means operated by said abutment 10 ion on said shaft, a Worm engaging said pinmembers and engaging said Worm whereby ion, a second shaft, drive gearing connecting the Worm is reciprocated in conjunction with 5 said shaft and said worm, means operated by the abutment members. i 7 said second shaft for reciprocating said Worm In testimony whereof I hereunto affix my including a cam carried by said second shaft. signature.

abutment members disposed in the path of FRED MERDIAN. 

